21324224311 has 4 divisors (see below), whose sum is σ = 22964549272. Its totient is φ = 19683899352.

The previous prime is 21324224309. The next prime is 21324224333. The reversal of 21324224311 is 11342242312.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 21324224311 - 2¹ = 21324224309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21324624311) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 820162461 + ... + 820162486.

It is an arithmetic number, because the mean of its divisors is an integer number (5741137318).

Almost surely, 2^21324224311 is an apocalyptic number.

21324224311 is a deficient number, since it is larger than the sum of its proper divisors (1640324961).

21324224311 is a wasteful number, since it uses less digits than its factorization.

21324224311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640324960.

The product of its digits is 2304, while the sum is 25.

Adding to 21324224311 its reverse (11342242312), we get a palindrome (32666466623).

The spelling of 21324224311 in words is "twenty-one billion, three hundred twenty-four million, two hundred twenty-four thousand, three hundred eleven".